2015/12/31 by Rajesh Kumar Bachchan, R. K. Bachchan, D. Hobbs +1
Biochemistry, Genetics and Molecular Biology · Earth and Planetary Sciences · Physics and Astronomy · #Artificial intelligence #Astronomy #Astrophysics #Classical mechanics #Computer science #Cosmology and Gravitation Theories #Frame (networking) #Frame of reference #Galaxy #Geodesy #Geography #Geomagnetism and Paleomagnetism Studies #Geophysics and Gravity Measurements #Motion (physics) #Physics #Proper motion #Quasar #Reference frame #Stars #Telecommunications #astro-ph.CO #astro-ph.IM
paper · pdf · doi:10.1051/0004-6361/201527935
published as A&A 589, A71 (2016) · published in A&A, revised version (v2) (Abstract is same as v1 as the character limit is 1920, see the pdf for v2)
openalex publication_date 2016/02/29 · arxiv created 2016/06/02 · arxiv updated 2016/06/03 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Context. Gaia’s very accurate astrometric measurements will allow the optical realisation of the International Celestial Reference System to be improved by a few orders of magnitude. Several sets of quasars are used to define a kinematically stable non-rotating reference frame with the barycentre of the solar system as its origin. Gaia will also observe a large number of galaxies. Although they are not point-like, it may be possible to determine accurate positions and proper motions for some of their compact bright features.